CVE-2026-11834

A command injection vulnerability has been identified in the DHCP option processing logic in multiple TP-Link router models, due to insufficient validation of externally supplied DHCP option data. An adjacent attacker may exploit this vulnerability by supplying crafted DHCP responses, potentially resulting in unauthorized command execution during device initialization or provisioning workflows. This typically occurs when the device is in a factory-default or unconfigured state. Successful exploitation may allow an adjacent, unauthenticated attacker to execute arbitrary commands with elevated privileges, potentially leading to full compromise of the affected device and unauthorized administrative control.

CVSS

No CVSS.

References

Link	Resource
https://mattg.systems/posts/cve-2026-11834/
https://www.tp-link.com/en/support/download/archer-c20/
https://www.tp-link.com/en/support/download/archer-mr200/#Firmware
https://www.tp-link.com/en/support/download/archer-mr402/#Firmware
https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware
https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware
https://www.tp-link.com/us/support/download/archer-c20/
https://www.tp-link.com/us/support/faq/5141/

Configurations

No configuration.

History

26 Jun 2026, 22:16

Type	Values Removed	Values Added
References		() https://mattg.systems/posts/cve-2026-11834/ -

22 Jun 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-22 19:16

Updated : 2026-06-26 22:16

NVD link : CVE-2026-11834

Mitre link : CVE-2026-11834

CVE.ORG link : CVE-2026-11834

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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"https://www.tp-link.com/en/support/download/archer-mr402/#Firmware", "source": "f23511db-6c3e-4e32-a477-6aa17d310630"}, {"url": "https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware", "source": "f23511db-6c3e-4e32-a477-6aa17d310630"}, {"url": "https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware", "source": "f23511db-6c3e-4e32-a477-6aa17d310630"}, {"url": "https://www.tp-link.com/us/support/download/archer-c20/", "source": "f23511db-6c3e-4e32-a477-6aa17d310630"}, {"url": "https://www.tp-link.com/us/support/faq/5141/", "source": "f23511db-6c3e-4e32-a477-6aa17d310630"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "f23511db-6c3e-4e32-a477-6aa17d310630", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "A command\ninjection vulnerability has been identified in the DHCP option processing logic\nin multiple TP-Link router models, due to insufficient validation of externally\nsupplied DHCP option data.\u00a0An adjacent attacker may exploit this\nvulnerability by supplying crafted DHCP responses, potentially resulting in unauthorized\ncommand execution during device initialization or provisioning workflows. This\ntypically occurs when the device is in a factory-default or unconfigured state.\n\n\n\n\n\nSuccessful\nexploitation may allow an adjacent, unauthenticated attacker to execute\narbitrary commands with elevated privileges, potentially leading to full\ncompromise of the affected device and unauthorized administrative control."}], "lastModified": "2026-06-26T22:16:30.897", "sourceIdentifier": "f23511db-6c3e-4e32-a477-6aa17d310630"}